We used BigBrain [1]}, a three-dimensional image of a human
brain with voxel intensities ranging from 0 to 65,535. The original data is
stored in 125 blocks in the MINC [2]} HDF5-based format, available
at ftp://bigbrain.loris.ca/BigBrainRelease.2015/3D_Blocks/40um at a
resolution of 40. We converted the blocks into the
NIfTI format, a popular format
in neuroimaging. We left the NIfTI blocks uncompressed, resulting in
a total data size of 81.
To evaluate the effect of block size, we resplit these blocks into 30, 125 and 750 blocks of
2.7, 0.648, and
0.108, using the sam library.
